| S.N. Roy | |
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Samarendra Nath Roy
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| Born | 11 December 1906 Dhaka, Bangladesh, (erstwhile East Bengal) |
| Died | 23 July 1964 (aged 57) Jasper, Alberta, Canada |
| Residence | India, USA |
| Fields | Mathematics |
| Institutions | Calcutta University Indian Statistical Institute University of North Carolina, Chapel Hill |
| Alma mater | Calcutta University University of North Carolina, Chapel Hill |
| Doctoral advisor | Prasanta Chandra Mahalanobis |
| Known for | Multivariate analysis |
Samarendra Nath Roy or S. N. Roy (Bangla: সমরেন্দ্র নাথ রায়; 11 December 1906 – 23 July 1964) was an Indian-born American mathematician and an applied statistician. He was the first of two children of Kali Nath Roy and Suniti Bala Roy.[1] His father, Kali Nath Roy was a freedom fighter and the Chief Editor of the newspaper TRIBUNE.[2][3]
Prof. Roy had a brilliant academic career. He secured first division in the Matriculation Examination in 1923. He came first in the Intermediate Science (Higher Secondary) Examinations in 1925. He also became first class first in both the B.Sc. Mathematics (Honours) from Presidency College of the University of Calcutta in 1928 and the M.Sc. examinations from the University of Calcutta in 1931.[1]
At that time Professor P. C. Mahalanobis was the director of the new (1931) Indian Statistical Institute. Several talented young scholars including J. M. Sengupta, H. C. Sinha, Raj Chandra Bose, S. N. Roy, K. R. Nair, K. Kishen and C. R. Rao, joined to form an active group of statisticians under Prof. Mahalanobis. S. N. Roy was one of the very early students of Prof. Prasanta Chandra Mahalanobis, who initiated some of the early works in Statistics.[4] He was well known for his pioneering contribution to multivariate statistical analysis, mainly that of the Jacobians of complicated transformations for various exact distributions, rectangular coordinates and the Bartlett decomposition.[5] His dissertation included the Post master's work at the Indian Statistical Institute where he worked under Mahalanobis.
It was Bose who first went to the United States as a visiting professor at Columbia University and the University of North Carolina, Chapel Hill in 1947. Roy later joined him at the University of North Carolina Chapel Hill and later became Professor of Statistics. S. N. Roy had 15 doctorate students there from 1950 till 1963.[6] To commemorate his Birth Centenary an International Conference on "Multivariate Statistical Methods in the 21st Century: The Legacy of Prof. S.N. Roy" was held at Kolkata, India during December 28–29, 2006.[7] The Journal of Statistical Planning and Inference published a special Issue for celebrating of the Centennial of Birth of S. N. Roy.[8]
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